Approximately 9 out of 10 smokers began smoking before the age of 21. in a group of 400 smokers, about how many of them started before they reached their 21st birthday?

Plot the intercepts to graph the equation

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3